本文
No.2（2007）18.The characteristics of rapid detection of irradiated foods by photostimulated luminescence (PSL)
Masayuki Sekiguchi, Masao Yamazaki, Mizuno Hiroaki, Michiko Goto, Shoji Hagiwara, Setsuko Todoriki, Katsunori Honda
The Photostimulated luminescence (PSL) method offered a rapid, convenient and sensitive way for detecting irradiated food. We developed a new PSL system with the tree classification modes for identifying irradiated foods. The present study reports the changes of the signal intensities and the typical decay curves of PSL for irradiated the powdered leaf products and several kinds of silicate minerals under dark storage. Any of powdered leaf products under dark storage at 4-50 ℃ showed the typical decay curves of PSL even after 5 months ,and irradiated paprika and yellow ocher could be still identify after heat-treatment at 120 ℃. PSL intensities of silicate minerals increased with the increase of radiation dose and show a linear relationship up to a about 1 kGy, but varied among silicate minerals.
Keywords
Photostimulated luminescence(PSL), irradiated foods, detection method, rapid measurement, silicate minerals
